To investigate the characteristics of isotopic composition of typhoon samples as the time proceeds, precipitation samples of five typhoon events were collected at Tsukuba, in 2001 and 2002. Isotopic compositions of typhoon's precipitation vary over wide range, and at the time when the typhoon's eye passed over observation site in Tsukuba, isotopic compositions decrease rapidly. Isotopic compositions of all typhoon samples are approximately on the local meteoric water line. Typhoon No. 15 in 2001 and No. 6 in 2002 of which total precipitation amount exceed 60 mm, isotopic compositions are more lighter than those of weighted mean of annual precipitation in Tsukuba. When the intensive precipitation happen, especially, the stable isotopic compositions of precipitation can be used for estimation of the soil water movement.